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VSP 8600 Generates/Floods Bogus MAC Addresses To Connected ERS When SMLT Down

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TitleVSP 8600 Generates/Floods Bogus MAC Addresses To Connected ERS When SMLT Down
Symptoms
  • Stack of ERS 5952GTS-PWR+ MAC table filled with bogus MAC addresses
  • MAC addresses all start with 40:00:40 and appear to sequentially increment
***** MAC Address Table *****
Mac Address Table Aging Time: 300
Learning Enabled Ports ALL
Number of addresses: 28010    <<<<<<Can reach max table size of 32,000

   MAC Address    Vid   Type       Source    
----------------- ---- ------- -------------- 
00-09-0F-09-01-19  700 Dynamic Trunk:1
40-00-40-06-00-01  700 Dynamic Trunk:1
40-00-40-06-00-03  700 Dynamic Trunk:1
40-00-40-06-00-06  700 Dynamic Trunk:1
40-00-40-06-00-0D  700 Dynamic Trunk:1
40-00-40-06-00-0E  700 Dynamic Trunk:1
40-00-40-06-00-0F  700 Dynamic Trunk:1
40-00-40-06-00-10  700 Dynamic Trunk:1
40-00-40-06-00-11  700 Dynamic Trunk:1
40-00-40-06-00-12  700 Dynamic Trunk:1
40-00-40-06-00-13  700 Dynamic Trunk:1
40-00-40-06-00-14  700 Dynamic Trunk:1
40-00-40-06-00-15  700 Dynamic Trunk:1
40-00-40-06-00-16  700 Dynamic Trunk:1
40-00-40-06-00-17  700 Dynamic Trunk:1
40-00-40-06-00-18  700 Dynamic Trunk:1
40-00-40-06-00-19  700 Dynamic Trunk:1
40-00-40-06-00-1A  700 Dynamic Trunk:1
40-00-40-06-00-1B  700 Dynamic Trunk:1
40-00-40-06-00-1C  700 Dynamic Trunk:1
40-00-40-06-00-1D  700 Dynamic Trunk:1
40-00-40-06-00-1E  700 Dynamic Trunk:1
40-00-40-06-00-1F  700 Dynamic Trunk:1
40-00-40-06-00-20  700 Dynamic Trunk:1
40-00-40-06-00-21  700 Dynamic Trunk:1
  • Bogus MAC's learned from pair of VSP 8600's via SMLT
  • Neither VSP 8600 has the bogus MAC's in it's forwarding table
  • Port mirrors confirm bogus MAC's are not ingressing the pair of VSP 8600's upstream
  • Port mirrors taken on VSP 8600 and ERS trunk ports confirm bogus MAC's being generated/sent by one VSP 8600 in the pair
  • Issue occurs if manually setting mlt type to normal or if SMLT goes down due to port going down
Environment
  • ERS 5952GTS-PWR+
  • FW 7.5.0.4 / SW 7.7.0.003
  • VSP 8600
  • Release 6.3.0.0
Cause
Software defect VOSS-15542
Resolution
Fixed in 6.3.2.0 release
Additional notes

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